Drawing in solution with a three-way safety bulb

Make sure there is enough solution in your beaker to completely fill the pipet. (Never pipet a reagent directly from a reagent bottle.)

Carefully place the attachment of the three-way bulb over the mouth of the pipet. Squeeze the air valve (A) and the bulb simultaneously to empty the bulb of air. Place the tip of the pipet below the solution's surface in the beaker. Gradually squeeze the suction valve (S) to draw liquid into the pipet. When the liquid is above the specified volume, stop squeezing the suction valve (S). Do not remove the bulb from the pipet.

DO NOT ALLOW LIQUID TO ENTER THE PIPET BULB. If the level of the solution is not high enough, squeeze the air valve (A) and the bulb again to expel the air from the bulb. Draw up more liquid by squeezing the suction valve (S).

Touch the tip of the pipet to the inside of the beaker to remove the drop hanging from the tip. If this drop is not eliminated, the volume transferred will be slightly higher than the volume desired.